A double-stroke bidirectional strut

Abstract

This utility model discloses a multifunctional double-stroke bidirectional strut, comprising: a hollow guide tube and two strut mechanisms symmetrically arranged on the hollow guide tube; each strut mechanism includes a first moving part, a second moving part, and a sensing device. The first moving part is fixedly connected to the second moving part based on a connecting base and is movably sleeved on the hollow guide tube. The sensing device is installed on one side of the second moving part. The second moving part includes a drive motor, a fixed housing, and a push rod. The push rod is movably disposed within the fixed housing, and the output end of the drive motor is connected to the push rod, which moves within the fixed housing under the drive of the drive motor. By setting the first and second moving parts, the structures of the two parts can be movably overlapped, making the bidirectional strut structure more compact and shortening its radial length, which is beneficial for meeting various working needs in narrow spaces.

Description

Technical Field

[0001] This utility model relates to the field of mechanical mechanisms, and in particular to a double-stroke bidirectional strut. Background Technology

[0002] A strut is a slender rod mainly composed of a shaft, threads, and flanges, and is widely used in construction projects such as buildings, bridges, and wind turbine towers.

[0003] Most bidirectional struts on the market are single-stroke bidirectional struts. These struts are relatively long and occupy a lot of space. When working in narrow spaces, these bidirectional struts cannot enter the workspace. Even if they can enter the workspace, their range of motion is limited. These single-stroke bidirectional struts cannot meet the work requirements. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a double-stroke bidirectional strut. By setting a first moving part and a second moving part, some of the structures of the two parts can be movably overlapped, making the structure of the bidirectional strut more compact and shortening the radial length of the bidirectional strut, which is beneficial to meet various working needs in narrow spaces.

[0005] Accordingly, this utility model proposes a double-stroke bidirectional strut, which includes: a hollow guide tube and two strut mechanisms symmetrically arranged on the hollow guide tube;

[0006] Any of the strut mechanisms includes a first moving part, a second moving part, and a sensing device. The first moving part is fixedly connected to the second moving part based on a connecting base. The first moving part is movably sleeved on the hollow guide tube. The sensing device is installed on one side of the second moving part.

[0007] The second moving part includes a drive motor, a fixed housing, and a push rod. The push rod is movably disposed inside the fixed housing, and the output end of the drive motor is connected to the push rod. The push rod moves inside the fixed housing under the drive of the drive motor.

[0008] Preferably, symmetrically distributed guide grooves are provided on one end face of the hollow guide tube, and the strut mechanism is sleeved on the hollow guide tube based on the tension adjustment mechanism.

[0009] Preferably, the tension adjustment mechanism includes a clamping block and a plurality of eccentric cam clamping rods inserted on the clamping block;

[0010] The clamping block is driven by the plurality of eccentric cam clamping rods to clamp the hollow guide tube and the first moving part, or the clamping block is driven by the plurality of eccentric cam clamping rods to release the hollow guide tube and the first moving part.

[0011] Preferably, the push rod includes: a lead screw and a movable housing, the movable housing having a first connecting hole, the lead screw being threadedly connected to the movable housing based on the first connecting hole, and one end of the lead screw being connected to the output end of the drive motor;

[0012] The lead screw is driven by the drive motor to rotate, thereby causing the movable housing to move within the fixed housing.

[0013] Preferably, a support portion is provided at one end of the movable housing away from the drive motor, and one end of the movable housing is inserted into the support portion;

[0014] The support portion is driven by the movable housing to move along the working direction of the movable housing.

[0015] Preferably, the support includes: a support block having a receiving cavity and a first buffer spring disposed in the receiving cavity, one end of the first buffer spring being connected to the support block and the other end of the first buffer spring being connected to the movable housing.

[0016] Preferably, a plurality of spiked protrusions extend outward from the end face of the support block, and the plurality of spiked protrusions are distributed on the end face of the support block at a preset position.

[0017] Preferably, the sensing device includes: a mounting bracket, a moving mechanism, and a sensor. The mounting bracket has a second connection hole. The moving mechanism is movably inserted into the mounting bracket based on the second connection hole. The sensor is mounted on one side of the moving mechanism, and the output end of the sensor is aligned with the moving path of the moving mechanism.

[0018] Preferably, the moving mechanism includes: an abutting frustum, a connecting rod, and a first return spring sleeved on the connecting rod;

[0019] One end of the connecting rod is fixedly connected to the abutting truncated cone, and the connecting rod is inserted into the second connecting hole. One end of the first return spring is connected to the abutting truncated cone, and the other end of the first return spring is connected to the mounting bracket.

[0020] The moving mechanism is driven by an external force to move horizontally along the axis where the center of the second connecting hole is located.

[0021] Preferably, the mounting bracket is provided with a limiting block having a limiting hole, the limiting hole and the second connecting hole are located on the same axis, and the connecting rod passes through the second connecting hole and the limiting hole.

[0022] The beneficial effects of this utility model are:

[0023] This invention features two symmetrically arranged strut mechanisms on a hollow guide tube. These mechanisms can move close to or separate from each other, reducing the risk of tilting in the bidirectional strut and providing more stable support. The two strut mechanisms can move independently to adapt to various widths and application scenarios, enhancing the flexibility of the bidirectional strut. Furthermore, this invention includes a first moving part and a second moving part, with some of their structures movably overlapping, making the bidirectional strut more compact and shortening its radial length, which is beneficial for meeting various work requirements in confined spaces. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the double-stroke bidirectional strut in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the first moving part in this utility model;

[0027] Figure 3 This is a cross-sectional view of the first moving part in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the second moving part in this utility model;

[0029] Figure 5 This is a cross-sectional view of the second moving part in this utility model;

[0030] Figure 6 This is a schematic diagram of the support part in this utility model;

[0031] Figure 7 This is a cross-sectional view of the support portion in this utility model;

[0032] Figure 8 yes Figure 1 Enlarged view of point A in the image.

[0033] In the attached diagram: 1. Hollow guide tube; 11. Guide groove; 2. Support rod mechanism; 21. First moving part; 211. Tension adjustment mechanism; 2111. Clamping block; 2112. Eccentric cam clamping rod; 212. Mounting housing; 22. Second moving part; 221. Drive motor; 222. Fixed housing; 223. Push rod; 2231. Lead screw; 2232. Moving housing; 2233. First connecting hole; 23. Sensing device; 231. Mounting bracket; 232. Moving mechanism; 2321. Abutting frustum; 2322. Connecting rod; 2323. First return spring; 2324. Limiting block; 233. Sensor; 24. Connecting base; 25. Support part; 251. Support block; 252. First buffer spring; 253. Spiked protrusion. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Figure 1 This diagram shows the structure of the double-stroke bidirectional strut in this invention. Figure 2 A schematic diagram of the structure of the first moving part in this utility model is shown. Figure 3 A cross-sectional view of the first moving part in this utility model is shown. Figure 4 A schematic diagram of the structure of the second moving part in this utility model is shown. Figure 5 A cross-sectional view of the second moving part in this utility model is shown. Figure 6 A schematic diagram of the support portion in this utility model is shown. Figure 7 A cross-sectional view of the support portion in this invention is shown. Figure 8 It shows Figure 1The enlarged view at point A shows that the double-stroke bidirectional strut includes a hollow guide tube 1 and two strut mechanisms 2 symmetrically arranged on the hollow guide tube 1. The two strut mechanisms 2 can simultaneously approach or separate from each other, reducing the risk of tilting of the bidirectional strut and providing more stable support. Similarly, the two strut mechanisms can also move independently to adapt to various usage scenarios with different widths, improving the flexibility of the bidirectional strut. Each strut mechanism 2 includes a first moving part 21, a second moving part 22, and a sensing device 23. The first moving part 21 is fixedly connected to the second moving part 22 based on a connecting base 24. The connecting base 24 is located between the first moving part 21 and the second moving part 22, and the top of the connecting base 24 is fixedly connected to the bottom of the first moving part 21, and the bottom of the connecting base 24 is fixedly connected to the top of the second moving part 22, strengthening the connection between the first moving part 21 and the second moving part 22 and reducing the risk of detachment. The first moving part 21 is movably sleeved on the hollow guide tube 1, and the sensing device 23 is installed on one side of the second moving part 22. The second moving part 22 includes a drive motor 221, a fixed housing 222, and a push rod 223. The push rod 223 is movably disposed within the fixed housing 222, and the output end of the drive motor 221 is connected to the push rod 223. The push rod 223 moves within the fixed housing 222 under the drive of the drive motor 221. The extendable length of the second moving part 22 is fixed. The first moving part 21 moves on the hollow guide tube 1, thereby changing the position of the first moving part 21. The movement of the first moving part 21 drives the movement of the second moving part 22, adjusting the position of the second moving part 22 to adjust the extendable length of the bidirectional support rod. Parts of the structure of the first moving part 21 and the second moving part 22 are movably overlapped, making the structure of the bidirectional support rod more compact and shortening its radial length, which is beneficial for meeting various working requirements in narrow spaces.

[0036] It should be noted that the first moving part 21 is manually adjustable, while the second moving part 22 is motor-adjusted. The use of two different adjustment methods allows the staff to adjust the length of the bidirectional support rod according to different work scenarios, thereby meeting various work requirements.

[0037] Furthermore, symmetrically distributed guide grooves 11 are provided on one end face of the hollow guide tube 1, that is, two guide grooves 11 are provided on the hollow guide tube 1, and the two guide grooves 11 are symmetrically distributed. The guide grooves 11 are used to guide the movement direction of the first moving part 21, reducing the risk of the first moving part 21 deviating from the preset movement direction. The support rod mechanism 2 is sleeved on the hollow guide tube 1 based on the tension adjustment mechanism. The guide grooves 11 are used to guide the movement direction of the first moving part 21 and limit the movement range of the first moving part 21, preventing the first moving part 21 from moving out of the hollow guide tube 1, which would cause the first moving part 21 and the second moving part 22 to fall off the hollow guide tube 1, thus helping to ensure that the first moving part 21 and the second moving part 22 are stably installed on the hollow guide tube 1.

[0038] It should be noted that the first moving part 21 includes a hollow mounting housing 212, which is movably mounted on the hollow guide tube 1 and locked onto the hollow guide tube 1 based on a tension adjustment mechanism 211. The bottom of the mounting housing 212 is fixedly connected to the connecting base 24 by connecting bolts, ensuring that the first moving part 21 can drive the second moving part 22 to move simultaneously when it moves.

[0039] Furthermore, the tension adjustment mechanism 211 includes a clamping block 2111 and a plurality of eccentric cam clamping rods 2112 inserted on the clamping block 2111; the clamping block 2111 is driven by the plurality of eccentric cam clamping rods 2112 to clamp the hollow guide tube 1 and the first moving part 21, or the clamping block 2111 is driven by the plurality of eccentric cam clamping rods 2112 to release the hollow guide tube 1 and the first moving part 21. In this embodiment, the clamping block 2111 is provided with four cam clamping rods and four corresponding insertion holes. One of the four cam clamping rods is inserted into one of the four insertion holes, and the distance between two adjacent insertion holes is equal. This ensures that the four cam clamping rods clamp the clamping block 2111 and the hollow guide tube 1 from four different positions, preventing the clamping block 2111 from loosening on its own during use. This would cause the bidirectional support rod to loosen and fail to tighten at the corresponding position, thus ensuring a tight connection between the clamping block 2111 and the hollow guide tube 1 during use, reducing the risk of the clamping block 2111 loosening on its own, and improving the stability of the bidirectional support rod.

[0040] Furthermore, the push rod 223 includes a lead screw 2231 and a movable housing 2232. The movable housing 2232 has a first connecting hole 2233. The lead screw 2231 is threadedly connected to the movable housing 2232 based on the first connecting hole 2233. One end of the lead screw 2231 is connected to the output end of the drive motor 221. The lead screw 2231 is driven by the drive motor 221 to rotate, thereby driving the movable housing 2232 to move within the fixed housing 222. The first connecting hole 2233 has a thread corresponding to the lead screw 2231. When the drive motor 221 rotates, it drives the lead screw 2231 to rotate. Since the position of the lead screw 2231 is fixed, and both the movable housing 2232 and the fixed housing 222 are square, the inner wall of the fixed housing 222 exerts a force on the outer wall of the movable housing 2232, preventing the movable housing 2232 from rotating under the drive of the lead screw 2231. This facilitates relative rotation between the lead screw 2231 and the movable housing 2232, allowing the movable housing 2232 to move under the drive of the lead screw 2231, thereby enabling the movable housing 2232 to move within the fixed housing 222.

[0041] Furthermore, a support portion 25 is provided at one end of the movable housing 2232 away from the drive motor 221, and one end of the movable housing 2232 is inserted into the support portion 25; the support portion 25 is driven by the movable housing 2232 to move along the working direction of the movable housing 2232. The support portion 25 is used to abut against the corresponding wall, increasing the friction between the bidirectional support rod and the wall, reducing the risk of the bidirectional support rod slipping, and improving the stability of the bidirectional support rod in use. The working direction of the movable outer shell 2232 is either extending out of the fixed outer shell 222 or retracting into the fixed outer shell 222. When the working direction of the movable outer shell 2232 is extending out of the fixed outer shell 222, it pushes the support part 25 to move closer to the wall, so that the support part 25 abuts against the corresponding wall, increasing the friction between the bidirectional support rod and the wall, reducing the risk of the bidirectional support rod slipping, and improving the stability of the bidirectional support rod. When the working direction of the movable outer shell 2232 is retracting into the fixed outer shell 222, it drives the support part 25 to move away from the wall, so that the support part 25 does not contact the corresponding wall, making it convenient for the staff to adjust the position of the bidirectional support rod for the next operation.

[0042] Furthermore, the support portion 25 includes: a support block 251 with a receiving cavity and a first buffer spring 252 disposed in the receiving cavity. One end of the first buffer spring 252 is connected to the support block 251, and the other end of the first buffer spring 252 is connected to the movable housing 2232. The first buffer spring 252 is used to absorb the force between the support block 251 and the push rod 223, preventing the force between the support block 251 and the wall from being directly transmitted to the push rod 223, thus avoiding the risk of the push rod 223 breaking due to excessive radial force. This helps to buffer the force between the push rod 223 and the support rod, reducing the risk of the push rod 223 breaking and extending the service life of the bidirectional support rod.

[0043] Furthermore, multiple spiked protrusions 253 extend outward from the end face of the support block 251, and these spiked protrusions 253 are distributed at preset positions on the end face of the support block 251. In this embodiment, seventeen spiked protrusions 253 extend from the end face of the support block 251. When the support block 251 contacts the wall, the seventeen spiked protrusions 253 insert into the corresponding wall surface, and all seventeen spiked protrusions 253 simultaneously penetrate into the wall. After the spiked protrusions 253 are inserted into the wall, their ends penetrate deep into the wall material, forming a tight bond with the wall. This increases the connection strength between the spiked protrusions 253 and the wall, and also improves the stability of the entire structure. Even under external forces, such as wind and rain or human damage, the spiked protrusions 253 can maintain their stability and are not easily pulled out or damaged. At the same time, when the spike protrusion 253 is inserted into the wall, the spike protrusion 253 can grip the wall material, thereby enhancing the adhesion between the spike protrusion 253 and the wall, which helps to reduce the loosening or falling off of the spike protrusion 253 under the action of external force, and ensures that the support part 25 is stably connected to the wall.

[0044] Furthermore, the sensing device 23 includes a mounting bracket 231, a moving mechanism 232, and a sensor 233. The mounting bracket 231 has a second connection hole. The moving mechanism 232 is movably inserted into the mounting bracket 231 based on the second connection hole. The sensor 233 is mounted on one side of the moving mechanism 232, and the output end of the sensor 233 is aligned with the moving path of the moving mechanism 232. The mounting bracket is used to mount the moving mechanism 232 and the sensor 233. The alignment of the output end of the sensor 233 with the moving path of the moving mechanism 232 facilitates the sensor 233's timely detection of the moving mechanism 232 moving to the corresponding position. After the sensor 233 detects that the moving mechanism 232 has moved to the corresponding position, it generates and sends a corresponding electrical signal to the drive motor 221 to adjust the power of the drive motor 221. The sensing device 23 is used to sense whether the bidirectional strut is in contact with the wall. Based on whether the bidirectional strut is in contact with the wall, it generates and sends a corresponding electrical signal to the drive motor 221, thereby changing the output power of the drive motor 221. This prevents the drive motor 221 from maintaining a certain output power to push the second moving part 22 to contact the wall, which would cause the support part 25 to impact the wall at a high speed and break. This helps to reduce the speed at which the support part 25 contacts the wall, reducing the risk of the support part 25 breaking upon impact with the wall and extending the service life of the bidirectional strut.

[0045] It should be noted that the position of the sensing device 23 is slightly ahead of the position of the support part 25. That is, when the second moving part 22 moves towards the wall, the sensing device 23 contacts the wall first, and then the support part 25 contacts the wall. When the drive motor 221 is working, it pushes the second moving part 22 towards the wall. After the sensing device 23 contacts the wall, the moving mechanism 232 moves backward. The sensor 233 detects that the moving mechanism 232 has moved backward to the corresponding position. The sensor 233 generates and sends a corresponding electrical signal to the drive motor 221. Upon receiving the electrical signal, the drive motor 221 changes its output power to a low output power, thereby reducing the moving speed of the second moving part 22 and the moving speed of the support part 25. This reduces the risk of the support part 25 colliding with the wall and breaking, and extends the service life of the bidirectional support rod.

[0046] Furthermore, the moving mechanism 232 includes: an abutting frustum 2321, a connecting rod 2322, and a first return spring 2323 sleeved on the connecting rod 2322; one end of the connecting rod 2322 is fixedly connected to the abutting frustum 2321, and the connecting rod 2322 is inserted into the second connecting hole; one end of the first return spring 2323 is connected to the abutting frustum 2321, and the other end of the first return spring 2323 is connected to the mounting bracket 231; the moving mechanism 232 is driven by an external force to move horizontally along the axis where the center of the second connecting hole is located. The abutting frustum 2321 serves as the driving contact surface of the moving mechanism 232, and also as the connection point of one end of the first return spring 2323, ensuring that the spring can stably apply pushing or pulling forces. One end of the connecting rod 2322 is fixedly connected to the abutting frustum 2321, typically using welding, threaded connection, or fasteners to ensure a strong bond. The other end of the connecting rod 2322 is designed with appropriate size and shape to allow for smooth insertion into the second connecting hole, while ensuring that it is not obstructed by excessive friction during movement. The main function of the first return spring 2323 is to provide force; when the moving mechanism 232 is displaced by an external force, the spring can cause the moving mechanism 232 to return to its initial position. When the abutting frustum 2321 contacts the wall, the connecting rod 2322 slides along the second connecting hole, and the first return spring 2323 is compressed to store energy. When the abutting frustum 2321 is no longer in contact with the wall, the first return spring 2323 releases the stored energy, pushing the abutting frustum 2321 and the connecting rod 2322 to move in opposite directions until the abutting frustum 2321 returns to its initial position. This helps to ensure that the moving mechanism 232 can move repeatedly and realize the function of the moving mechanism 232 being reusable.

[0047] Furthermore, the mounting bracket 231 is provided with a limiting block 2324 having a limiting hole. The limiting hole and the second connecting hole are located on the same axis, and the connecting rod 2322 passes through the second connecting hole and the limiting hole. The connecting rod 2322 passing through both the second connecting hole and the limiting hole simultaneously restricts the movement range of the connecting rod 2322, preventing the connecting rod 2322 from deviating during movement. This would cause the connecting rod 2322 to deviate from its movement path, resulting in a change in the position and orientation of the abutting frustum 2321, making it impossible to accurately detect whether it has reached the wall. This helps to limit the movement direction of the connecting rod 2322, improve the accuracy of the sensing device 23, reduce the risk of the support part 25 colliding with the wall and breaking, and extend the service life of the bidirectional support rod.

[0048] In summary, this invention reduces the risk of tilting in the bidirectional support rod by symmetrically arranging two support rod mechanisms on the hollow guide tube. These mechanisms can move close to or separate from each other, providing more stable support. The two support rod mechanisms can move independently to adapt to various widths and application scenarios, increasing the flexibility of the bidirectional support rod. Furthermore, this invention includes a first moving part and a second moving part, with some structures movably overlapping, making the bidirectional support rod more compact and shortening its radial length, which is beneficial for meeting various work requirements in confined spaces.

[0049] Furthermore, the above description provides a detailed account of a double-stroke bidirectional strut and a car door provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A dual travel bi-directional brace characterized by, The double-stroke bidirectional strut includes: a hollow guide tube and two strut mechanisms symmetrically arranged on the hollow guide tube; Each of the aforementioned strut mechanisms includes a first movable part, a second movable part, and a sensing device. The first movable part is fixedly connected to the second movable part. The first movable part is movably sleeved on the hollow guide tube. The sensing device is installed on one side of the second movable part. The second moving part includes a drive motor, a fixed housing, and a push rod. The push rod is movably disposed inside the fixed housing, and the output end of the drive motor is connected to the push rod. The push rod moves inside the fixed housing under the drive of the drive motor.

2. The dual travel, dual direction brace bar of claim 1, wherein, The hollow guide tube has symmetrically distributed guide grooves on one end face, and the strut mechanism is sleeved on the hollow guide tube based on the tension adjustment mechanism.

3. The dual travel, dual direction brace bar of claim 2, wherein, The tension adjustment mechanism includes a clamping block and multiple eccentric cam clamping rods inserted on the clamping block; The clamping block is driven by the plurality of eccentric cam clamping rods to clamp the hollow guide tube and the first moving part, or the clamping block is driven by the plurality of eccentric cam clamping rods to release the hollow guide tube and the first moving part.

4. The dual travel, dual direction brace bar of claim 1 wherein, The push rod includes: a lead screw and a movable housing, the movable housing having a first connecting hole, the lead screw being threadedly connected to the movable housing based on the first connecting hole, and one end of the lead screw being connected to the output end of the drive motor; The lead screw is driven by the drive motor to rotate, thereby causing the movable housing to move within the fixed housing.

5. The dual travel, dual direction brace bar of claim 4, wherein, A support portion is provided at one end of the movable housing away from the drive motor, and one end of the movable housing is inserted into the support portion; The support portion is driven by the movable housing to move along the working direction of the movable housing.

6. The dual travel, dual direction brace bar of claim 5, wherein, The support includes a support block having a receiving cavity and a first buffer spring disposed in the receiving cavity, one end of the first buffer spring being connected to the support block and the other end of the first buffer spring being connected to the movable housing.

7. The dual travel, dual direction brace bar of claim 6 wherein, Multiple spiked protrusions extend outward from the end face of the support block, and the multiple spiked protrusions are distributed on the end face of the support block according to a preset position.

8. The dual travel, bi-directional strut of claim 1, wherein, The sensing device includes a mounting bracket, a moving mechanism, and a sensor. The mounting bracket has a second connection hole. The moving mechanism is movably inserted into the mounting bracket based on the second connection hole. The sensor is mounted on one side of the moving mechanism, and the output end of the sensor is aligned with the moving path of the moving mechanism.

9. The double-stroke bidirectional strut according to claim 8, characterized in that, The moving mechanism includes: an abutting frustum, a connecting rod, and a first return spring sleeved on the connecting rod; One end of the connecting rod is fixedly connected to the abutting truncated cone, and the connecting rod is inserted into the second connecting hole. One end of the first return spring is connected to the abutting truncated cone, and the other end of the first return spring is connected to the mounting bracket. The moving mechanism is driven by an external force to move horizontally along the axis where the center of the second connecting hole is located.

10. The dual travel, bi-directional strut of claim 9, wherein, The mounting support is provided with a limiting block with a limiting hole, the limiting hole and the second connecting hole are located at the same axis, and the connecting rod passes through the second connecting hole and the limiting hole.

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